Kinkly explains Penis Gag

Gags come in a sorts of shapes and sizes. Penis gags are mostly used for visual appeal (simulating fellatio) or for humiliation of the person wearing it. They are not more effective than other types of gags. They can even be more dangerous because of the risk of choking. Shorter penis gags that don't go very deep in the mouth are the safest. Large ones are visually impressive, but may endanger the wearer.